A few of us have done it and I would really recommend it for those who feel like modding their cars. As Ken said, it works much better if you have other bolt-on mods.
Mind you that the effects are not instant but you will gradually feel the difference as the ECU adapts to the flash.

A few of us have done it and I would really recommend it for those who feel like modding their cars. As Ken said, it works much better if you have other bolt-on mods.
Mind you that the effects are not instant but you will gradually feel the difference as the ECU adapts to the flash.

Definitely need to feel it to understand. For a 330i, the mid-range is powerful but the low end really is rather lazy. You almost need to floor it to get up to 3000rpm. What if I always shift into DS mode?